The real ketogenic diet requires you to get 80-90 percent of your calories from fat. You should also consume about one gram of protein per kilogram of bodyweight and limit carbs to 10-15 grams a day. That’s a huge shift from the average American diet, in which about half of all calories come from carbs. It’s still not clear exactly why the diet works to treat epilepsy, or why it seems to help with a variety of other neurological diseases, but it probably has something to do with the biochemical changes it produces inside the body.
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